Machine for extruding metals.



PATENTED AUG. 18, 1908.

G. H. BENJAMIN. MACHINE FOR EXTENDING METALS.

APPLICATION FILED DEC. 2, 1907.

2 SHEETSSHEET 1.

. K ///////%///P///// E WITNESSES:

No. 896,684. PATENTED AUG. 18, 1908.

G. H. BENJAMIN.

MACHINE FOR EXTRUDING METALS. APPLICATION FILED DEG. 2, 1907.

5 FIGS. 50 6 2 SHEETS-SHEET 2.

27 5 .FIGA.

ii n 36' 30 X 1 j, I WWW/7 ,3 24 3; a 4/ W I I 4 50m I, 25 i; 0 I 3 9 g 9 j 7 I 3/ v f 25 If S 33 6%?22 3/ Z V r WITNESSES: 4 H IINVENTOR 1 fl 27 II 'I W 1 UNITED STATES PATENT OFFICE.

GEORGE E. BENJAMIN, or NEW YORK, N. Y.

MACHINE FOR nx'rmmme METALS.

Specification of Letters Patent.

Patented Aug. 18, 1908.

' 1 Application filed December-2, 1907.- Serial No. 404,784.

' machine, from which furnace it was drawn by a workman, carried to, and inserted into the container of the extrusion machine, after which pressure was put upon the billet to force the metal through the die to give it the required shape. This operation in practice has been found open to the following objec tions: First: it required'the expenditure of hand labor. Second: it required considerable time to draw the billet from the furnace, and carry and insert it into the extruding machine. Third: it exposed the metal to the cooling and oxidizing action of the atmosphere. Fourth: it made it practicall impossible to extrude billets formed of aloys, which are only extrudable at definite temperatures. I

It is the object of my invention to overcome the objections stated, and this is ;ac-,

complished by the employment ofthe means which I will now proceed to describe.

The accompanying drawings will serve to illustrate my invention, in which- Figure 1 is a plan view partially in section; Fig. 2 is a partlal elevation and vertical section, showing the container in the receiving position, with the billet" to be .extrude within the container Fig. 3 is a similar view, showing the container in the extruding position, with the billet in'the container in the position to be acted upon by the pusher; and

ig. '4 is a transverse section looklng from the left, with the container in the position-shown in Fig. 2.

The generalfeatures of the extrusion machine shown in the drawings are those disclosed in U. S. Patent No. 819,261, granted to W. A. Wood, May 1, 1906, and consist generally of the following parts: A container 5, a hydraulic pusher 6, and a die 7. The particular form or construction of the extrusion machine is immaterial. Difler'ent forms exist and they all may be used. It is only necessary that the container should be mounted upon trunnions 8 and means be ro'vided, such as a crank 9, and gears 10, or changing the position of the container from the-horizontal, as shown in Fig. 3, to the vertical, as shown in Fig. 2; or, preferably, to provide for complete rotation of the cylinder, for the purpose which will be hereinafter described.

The billet to be extruded I prefer to heat I rogressively, 'i,. e.,as it is carried forward om the position where it is introduced into the furnace to the position where it is introduced into the container, and to accomplish this result I provide a rotary heating apparatus. This apparatusconsists of a series of furnaces 12, 13, 14, and 15, supported u on a s ider 16 ,mounted to rotate around atu ular earing 17. Means is provided for rotating the s ider, which consists of a gear 18, worm 19, s aft 20, bevel gears 21, 22, and hand wheel 23. Of course, any other suitable means TIRE be provided for rotating the furnaces;

ach of the furnaces 12, 13, 14, and 15 consists of a tubular-casing 24, lined with firebrick, and provided with a vertically movable bottom 25. These furnaces are provided with burners 26, through which gas and air may be admitted and subsequently ignited within the furnace. Preferably a non-oxidizing flame is employed. The bearing 17 is hollow and through it-the gas is carried, being introduced through an'opening 27, and emitted through anopening 28, into a. channel 29, communicating with a pipe 30. The air is introduced through a channel 31, surrounding the tubular shaft of the spider, and is emitted into a channel 32 communicatin with a pipe 33. It will be observed that t e ipes 30 and 33 combine, asis usual,

' to form t e burners 26.

Situated under the container 5 is a hydraulic cylinder 34, the piston of which has an external member 35, adapted to cooperate with the'movable'bottom 25 of the furnaces as they come into position over the cylinder 34.

The furnaces 12, 13, 14, and 15 are shown as open at the top, and covering three of these furnaces is a disk screen 36,provided .with openings 37.. This screen has a projection 38, which co-acts with the container 5 when the container is rotated from the vertical to the horizontal position, and serves to prevent the heated billet from slipping out of the container during the act'of changin from one position to the other. Situate over thescreen 36 are perforated covers 40 'containeris in the position shown in Fig. 2.

Above the disk 36, and between it and the extrusion machine, there can be placed. a hood for carrying the products of combustion from the furnaces, but owing to the fact that combustion in these furnaces is entirely controllable, such a hood is not essential.

In the drawings I have shown-four furnaces, located below the extrusion machine. I do not limit myself to the number of furnaces, or to the osition of the furnacesfnor do I'limit mysel in any wise to the various features of construction disclosed, as, manifestly, they may be considerably varied with-' out departing from the intent of my invention.

The mode of o eration which I employ is as follows: The billet 50, either cold or partially heated, is inserted into a furnace, for instance the furnace 12, when such furnace is at the position marked A, Fig. 1, and the flame turned into the furnace. After a time, i. e.,afterthe billet Within the container at the time has been extruded, such furnace is rotated to the position marked B, and-subsequently, after another extrusion hastaken place,vto the position marked and again, after another extrusion, to

the position marked D. When the furnace is in the D position, thecontainer 5 is moved from the horizontal to the vertical position, i. e.,from the position shown in Fig. 3 to the position shown in Fig. 2. The hydraulic cylinder 34. is then operated, with theieflect that its member 35 moves under the movable bottom 25 of the furnace and lifts the billet in the furnace into the cavity of the container 5. Immediately, the container is rotated to the position shown in Fig. 3, and

the container and die adjusted relative to each other. The pusher 6 is then driven into the container and a ainst the billet to push the metal of the bi] et through the die 7 Immediately afterwards, the pusher is withdrawn and the next furnace, for instance the furnace 15, which has followed the movements of, for instance the furnace 12, is brought under the container and the action repeated. It sometimes happens that the end of the billet which is not extruded sticks in the forward end of the container, in which case it is necessary to remove it. This is accomplished by reversely rotating the container 5 so that its forward end shall lie over the em ty furnace with the flame in full play in the 511118108. is sufficient to melt the material in the container, so that it may be readily removed. In the case of alloys,- for instance certain zinc alloys, which are friable above. and below their extruding temperature, I refer to heat the billet tov a temperature above that at which it can be extruded, that isI progressively heat the billet in the furnaces at the A, B, and O lpositions. temperature 0 the billet in the furnace at the D position, no heat being turned on, to an extrudable condition, after which the billet is-introduced into the container without exposing it to the atmosphere, and is then subjected to pressure to drive it through the die.

I then reduce the Having thus described myv invention, I

Y 3. In a machine for extruding metals, the

combination of a series of furnaces, a container, means for carrying the heated billet from a furnace directly into the container, a die, and a pusher for forcing the heated billet through the die.

4. In a machine for extruding metals, the

combination of a container, a series 'offur,

naces adapted to be moved progressively under the container, means for lifting the heated billet from the furnace which at the 1 I time is underthe container into the cavity of the container, together with means foreffecting the required movements of the container and the furnaces.

5. In a machine for extruding metals, the combination of a container, a series of furnaces adapted to be moved progressively to and from a position in the axis of the container in a vertical position, means for lifting a heated billet from the furnace which at the time is under the container into the cavity of the container, together with means for effecting the required movements of the container and furnaces, and for subjecting the billet to pressure when within the container.

6. In a machine for extruding metals, the combination of a pivoted container, a horizontally acting pusher, a die, a series of furnaces mounted on a spider and adapted for horizontal rotation under said container, means for heating said furnaces, and means for pushing the heated billet from one of said I furnaces into the container when the con-. I tainer 1s 1n the charging position. The heat from-the furnace GEO. H. BENJAMIN.

Witnesses M. TURNER,

PAUL H. MARROW. 

